circle n. 1.圆;圆周;圈;环;环状物。 2.圆形场地,马戏场;(铁路的)环行交叉口;(体育场的)圆形看台;(剧场的)楼厅。 3.周期,循环;(天体运行的)轨道;(体操的)环转运动;【逻辑学】循环论法〔= vicious circle〕;(科学等的)完整体系,整体。 4.党派,圈子,集团,…界,(活动、势力、思想等的)范围。 the Arctic [Antarctic] C- 北极[南极]圈。 circle of acquaintance 交际圈。 the dress circle(戏院的)花楼;月楼。 the upper circle 楼厅后座。 the upper circles 上层社会。 business [military, political] circles 实业[军、政]界。 (have) a large circle of friends 交游广阔。 a swing around [round] the circle 发表政见的巡回旅行。 a vicious circle 1. 恶性循环。 2. 【逻辑学】循环论证。 circle of illumination 【天文学】昼夜分界圈。 circle of latitude [longitude] 【天文学】黄纬[黄经]圈。 circle of vegetation 【生物学】群落环。 come full circle 绕了一圈,兜了一个圈子。 full circle (thinking) 充分的(考虑)。 go all round the circle (话)婉转,兜圈子。 in a circle 成圆形地,围着(…坐)( argue in a circle用循环论法论证)。 run round in circles 〔口语〕忙得团团转。 square the circle 求与圆面积相等的正方形;试图做不可能的事,妄想。 vt. 围,环绕;绕过。 vi. 1.盘旋,环行,兜圈子;旋转,回转。 2.流传。
During this paper, definition of the measure enter-cover-probability is given, andthree-dimension detection space are transformed to level detection circles on differentheights . aiming at the most normal situation of symmetric line, cross-to line and cross-awayline taken by the carrier, probablely-enter-cover-target-distribution are analysed in relativemovement method on the premise that targets fly perpendicular to the flying direction of thecarrier . mont-cario method is used to simulate uniformly-distributed-targets situation and getthe measure, and results are used to analyse the influence of line-landscape-orientation-ratio, line-portrait-ratio, and speed-ratio on the measure . for further research, influences of height and blind space are also discussed on base ofradar level detection range, and situations of non-uniformly-distributed targets are alsoresearched 为了分析主动探测空间动态性能,本文首先提出以“目标进入雷达覆盖区概率”(简称为“覆盖率”)作为评价指标;然后将三维探测空间转换为不同高度层对应的水平探测圆,针对载机采用双平行航线、交叉相向航线和交叉同向航线的最一般情形,采用相对运动的方法,分析目标垂直入侵时可能进入雷达覆盖区的目标分布情况;再运用蒙特卡洛法进行仿真计算,分析并比较目标服从均匀分布时航线横比、航线纵比及速度比对性能的影响。
Secondly, according to the basic theory of the general spectrometer, in this paper we discuss the fundamental, the compositions and the characters of tcecs . we analyze the main influencing factors for resolving power, such as the dispersion of the x-ray on the detection circle, spectra location error and the aperture width etc . and we put out the ways to resolving the problems 接下来,本文根据经典光谱仪器的基本理论,着重讨论了双通道椭圆弯晶谱仪的基本原理,及其基本组成和基本特性,并从x射线波长在探测圆上的弥散度、光度参数与探测角之间的关系、狭缝宽度等方面对谱仪的精度和分辨率的影响作了一定的分析,并提出了解决问题的办法。